What are the differences between unsaturated fatty acids and saturated fatty acids in terms of their chemical structures and health effects?

Unsaturated fatty acids have double bonds in their chemical structure, while saturated fatty acids do not. Unsaturated fats are generally considered healthier as they can help lower cholesterol levels and reduce the risk of Heart disease. Saturated fats, on the other hand, are linked to increased cholesterol levels and a higher risk of heart disease when consumed in excess.